EP0541943A3 - - Google Patents

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Info

Publication number: EP0541943A3
Authority: EP; European Patent Office
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP19920116626

Other versions

EP0541943A2 (en

Inventor

Edgar M. Williams

Peter G. Bischoff

Shin-Ichi Akoh

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Read Rite Corp

Original Assignee

Read Rite Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1991-11-12

Filing date

1992-09-29

Publication date

1994-08-03

1992-09-29 Application filed by Read Rite Corp filed Critical Read Rite Corp

1993-05-19 Publication of EP0541943A2 publication Critical patent/EP0541943A2/en

1994-08-03 Publication of EP0541943A3 publication Critical patent/EP0541943A3/xx

Status Withdrawn legal-status Critical Current

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Magnetic Heads (AREA)

EP92116626A 1991-11-12 1992-09-29 Thin film magnetic head with narrow yoke Withdrawn EP0541943A2 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US78993491A	1991-11-12	1991-11-12
US789934		1991-11-12

Publications (2)

Publication Number	Publication Date
EP0541943A2 EP0541943A2 (en)	1993-05-19
EP0541943A3 true EP0541943A3 (sr)	1994-08-03

Family

ID=25149156

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP92116626A Withdrawn EP0541943A2 (en)	1991-11-12	1992-09-29	Thin film magnetic head with narrow yoke

Country Status (5)

Country	Link
US (1)	US5255142A (sr)
EP (1)	EP0541943A2 (sr)
JP (1)	JPH05217116A (sr)
KR (1)	KR930010862A (sr)
CN (1)	CN1074307A (sr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5687045A (en) *	1991-09-20	1997-11-11	Hitachi, Ltd.	Thin film magnetic head and production method thereof and magnetic disk drive equipped with this thin film magnetic head
KR940007781A (ko) *	1992-09-04	1994-04-28	다니엘 에이. 네펠라	박막자기헤드
US5559653A (en) *	1993-12-10	1996-09-24	Yamaha Corporation	Thin film magnetic head having a multilayer upper core
US5600519A (en) *	1995-03-06	1997-02-04	International Business Machines Corporation	Controlled saturation thin film magnetic write head
US5798897A (en) *	1996-10-21	1998-08-25	International Business Machines Corporation	Inductive write head with insulation stack configured for eliminating reflective notching
US5805391A (en) *	1996-10-28	1998-09-08	International Business Machines Corporation	Write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height
KR100441170B1 (ko) *	1997-05-22	2004-10-12	삼성전자주식회사	측면트랙노이즈제거를위한헤드갭(gap)구조
JP3522614B2 (ja) *	1999-12-13	2004-04-26	Ｔｄｋ株式会社	薄膜磁気ヘッドの特性改善方法および装置
JP2002319109A (ja)	2001-04-20	2002-10-31	Shinka Jitsugyo Kk	薄膜磁気ヘッドおよびその製造方法
JP2004342210A (ja) *	2003-05-15	2004-12-02	Tdk Corp	垂直磁気記録用磁気ヘッドおよびその製造方法、ヘッドジンバルアセンブリならびにハードディスク装置
US8064160B2 (en)	2007-07-30	2011-11-22	Tdk Corporation	Magnetic head for perpendicular magnetic recording with coil wound around pole layer
US7564236B1 (en) *	2008-07-01	2009-07-21	Hitachi Global Storage Technologies Netherlands B.V.	Thermal fly height induced shield instability screening for magnetoresistive heads

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS60256903A (ja) *	1984-05-31	1985-12-18	Matsushita Electric Ind Co Ltd	磁気ヘツド
EP0314172A2 (en) *	1987-10-29	1989-05-03	Fuji Photo Film Co., Ltd.	Film magnetic head
DE3931374A1 (de) *	1988-09-20	1990-03-22	Hitachi Ltd	Magnetplattengeraet und verfahren zur informationsaufzeichnung und -wiedergabe
US5018038A (en) *	1988-10-04	1991-05-21	Fuji Photo Film Co., Ltd.	Thin film magnetic head with laminated metal and non magnetic film
EP0431633A2 (en) *	1989-12-06	1991-06-12	Sony Corporation	Magnetic transducer head for narrow track width recording

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3420746A1 (de) *	1984-06-04	1985-12-05	Siemens AG, 1000 Berlin und 8000 München	Schichtweise aufgebauter magnetkopf fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium
EP0320687A1 (de) *	1987-12-11	1989-06-21	Siemens Aktiengesellschaft	Dünnfilm-Magnetkopf zur vertikalen Magnetisierung
JP2585400B2 (ja) *	1988-03-23	1997-02-26	株式会社日立製作所	磁気デイスク装置

1992
- 1992-09-23 KR KR1019920017332A patent/KR930010862A/ko not_active Application Discontinuation
- 1992-09-29 EP EP92116626A patent/EP0541943A2/en not_active Withdrawn
- 1992-10-20 CN CN92111549A patent/CN1074307A/zh active Pending
- 1992-11-10 JP JP4299861A patent/JPH05217116A/ja active Pending
1993
- 1993-04-19 US US08/047,309 patent/US5255142A/en not_active Expired - Lifetime

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS60256903A (ja) *	1984-05-31	1985-12-18	Matsushita Electric Ind Co Ltd	磁気ヘツド
EP0314172A2 (en) *	1987-10-29	1989-05-03	Fuji Photo Film Co., Ltd.	Film magnetic head
DE3931374A1 (de) *	1988-09-20	1990-03-22	Hitachi Ltd	Magnetplattengeraet und verfahren zur informationsaufzeichnung und -wiedergabe
US5018038A (en) *	1988-10-04	1991-05-21	Fuji Photo Film Co., Ltd.	Thin film magnetic head with laminated metal and non magnetic film
EP0431633A2 (en) *	1989-12-06	1991-06-12	Sony Corporation	Magnetic transducer head for narrow track width recording

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 135 (P - 457)<2192> 20 May 1986 (1986-05-20) *
S. MITANI ET AL., IEEE TRANSLATION JOURNAL ON MAGNETICS IN JAPAN, vol. 3, no. 7, July 1988 (1988-07-01), NEW YORK US, pages 554 - 555, XP000095088 *
W. F. DRUYVESTEYN ET AL.: "Magnetic behavior of narrow track thin-film heads", JOURNAL OF APPLIED PHYSICS, vol. 52, no. 3, March 1981 (1981-03-01), NEW YORK US, pages 2462 - 2464 *

Also Published As

Publication number	Publication date
CN1074307A (zh)	1993-07-14
JPH05217116A (ja)	1993-08-27
KR930010862A (ko)	1993-06-23
US5255142A (en)	1993-10-19
EP0541943A2 (en)	1993-05-19

Publication	Publication Date	Title
TW217429B (sr)	1993-12-11
DE4290581T1 (sr)	1993-02-18
FR2676147B1 (sr)	1995-05-19
EP0499986A3 (sr)	1995-03-08
DK0518777T3 (sr)	1997-02-17
EP0525335A3 (sr)	1995-06-21
EP0534777A3 (sr)	1994-03-23
DE4290030T1 (sr)	1993-01-28
EP0510705A3 (sr)	1995-05-24
DE4291983T1 (sr)	1993-07-15
FR2677378B1 (sr)	1994-12-16
FR2675605B1 (sr)	1994-12-16
ECSM91550U (sr)	1992-04-10
DK189091D0 (sr)	1991-11-19
ECSM91551U (sr)	1993-08-03
ECSM91560U (sr)	1993-01-29
ECSM91565U (sr)	1994-03-21
AU8697691A (sr)	1992-04-16
EP0526856A3 (sr)	1994-02-09
EP0522615A3 (sr)	1994-04-13
CA2063166C (sr)	1993-04-08
CN3009762S (sr)	1991-06-05
AU8983291A (sr)	1992-05-14
EP0523876A3 (sr)	1994-03-09
EP0512706A3 (sr)	1994-01-26

Legal Events

Date	Code	Title	Description
1993-04-02	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1993-05-19	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB NL
1994-06-15	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1994-08-03	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB NL
1995-03-08	17P	Request for examination filed	Effective date: 19950104
1996-01-24	17Q	First examination report despatched	Effective date: 19951206
1997-08-08	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1997-09-24	18D	Application deemed to be withdrawn	Effective date: 19970401